Table entry for assignment of FO and var.trans.is missing; see long text

What causes this issue?

All variable transactions, including their internal numbers and the
object number of the financial object, for which a balance must be
recalculated, are recorded in an internal table.
An entry is missing in this table for variable transaction &V1&, so
that the balance, which is updated in administration tables JBRACCOUNT
and JBRAMOUNT in Risk Management, cannot be updated.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.